"""只读比对脚本：逐列比对 pms_dev(测试) 与 pms(生产) 的**全部**列定义

比对维度：COLUMN_TYPE / IS_NULLABLE / COLUMN_DEFAULT / EXTRA / COLUMN_COMMENT
另外单独统计两库是否还残留 `TIMESTAMP` 列（本项目禁止：sqlx 只能把它解码成 DateTime<Utc>，
而 Rust 侧时间列全是 NaiveDateTime/Option<NaiveDateTime> ⇒ 接口 500）。

用法： python .tmp-schema-align/compare_full.py
只发 SELECT，不做任何写入。
"""
import pymysql

COLSQL = """
SELECT TABLE_NAME, COLUMN_NAME, COLUMN_TYPE, IS_NULLABLE,
       IFNULL(CAST(COLUMN_DEFAULT AS CHAR),'<NULL>'),
       IFNULL(CAST(EXTRA AS CHAR),''),
       IFNULL(CAST(COLUMN_COMMENT AS CHAR),'')
FROM information_schema.COLUMNS
WHERE TABLE_SCHEMA=%s AND TABLE_NAME IN (
    SELECT TABLE_NAME FROM information_schema.TABLES
    WHERE TABLE_SCHEMA=%s AND TABLE_TYPE='BASE TABLE')
ORDER BY TABLE_NAME, ORDINAL_POSITION
"""


def snap(db):
    c = pymysql.connect(host="10.8.0.252", user="root", password="Hbhyg731024@", database=db)
    cur = c.cursor()
    cur.execute(COLSQL, (db, db))
    rows = {(r[0], r[1]): r[2:] for r in cur.fetchall()}
    c.close()
    return rows


dev, prd = snap("pms_dev"), snap("pms")
keys = sorted(set(dev) | set(prd))

print("=" * 118)
print("两库列定义比对：pms_dev(测试) vs pms(生产)   共 %d 列" % len(keys))
print("=" * 118)
diffs = []
for k in keys:
    d, p = dev.get(k), prd.get(k)
    if d != p:
        diffs.append((k, d, p))

if not diffs:
    print("✅ 全部 %d 列的 类型/可空性/默认值/EXTRA/注释 完全一致" % len(keys))
else:
    print("❌ 仍有 %d 列不一致：" % len(diffs))
    for k, d, p in diffs:
        print("  %-32s dev=%s" % (f"{k[0]}.{k[1]}", d))
        print("  %-32s prd=%s" % ("", p))

print()
ts_dev = sorted(k for k, v in dev.items() if v[0].startswith("timestamp"))
ts_prd = sorted(k for k, v in prd.items() if v[0].startswith("timestamp"))
print("pms_dev 残留 TIMESTAMP 列: %d %s" % (len(ts_dev), [f"{t}.{c}" for t, c in ts_dev]))
print("pms    残留 TIMESTAMP 列: %d %s" % (len(ts_prd), [f"{t}.{c}" for t, c in ts_prd]))